Milking machine teat cup assembly



Sept. 30, 1952 J. 1.. DAVIS 2,

MILKING MACHINE TEAT cup ASSEMBLY Filed June 5, 1950 2 SHEETSSHEET 1 James L. Davis INVENTOR.

Sept. 30, 1952 J DAVIS MILKING MACHINE TEAT CUP ASSEMBLY 2 SHEETSSHEET 2 Filed June 5, 1950 JM: WMW \MM\KCiSQURS\ H SS\ MMW Q N a 2 In I 4* .r M M 2 2 4? AU 11 m nu o 4 oz 4 4? 5% 0 v 0 z A? a 4 4 2 w 4 4 m l M Fig- 2 .5 w nu 0 L a m u M i n 0 W.

o t equipment or ssemb ed or d sassembled to erm these Patented Sept. 30, 1952 UNITED STATES PATENT"- OFFICE. I I 2,612, 9 '1 1 I i I MILKING, MACHINE 'rEA'r CUP ASSEMBLY James L. Davis, Le Roy, I I I hpplicationdune 5, 1950; Serial No. 166,135

This invention relates to new and1-useul improvements in milking machines and more particularly to a teat cup assembly for milking machines. v

The primary object ofthe present invention is to provide a teat cup fonuse with milking machines and so constructed as to permit the same to function in the identical steps as hand milking to prevent milk from being-forced back into. the

and which is self-contracting to eliminate the necessity of hav ng to mpl y rger bulk an ont ctin the. squeezin mer tw t-v Aiurther ob ect oi the nrese tieven iqe is to provide a teat. 0. m or milkin meqhin ertha s xtremelr smel and cement i l-structure and which includes a s th t ar euiddr and readily to he e d and re ained in tend. an-

sti. i her 9 "hQip-i fi m' i vention is to pr vide-a t at o r o the afo em ntio d charac er a is im le ndact al in con,-

st w o ;z s one d elia i se; emc ent'and durable in .operation'relatively inexpensive. to manuiacture, and otherwise well adapted torthe purposes for which the same is intended. I

Yet-another object of the present invention is th provision o a at up tha i o e ate on a reduce or ower vacu m toj re ent ir i at on of the tea s, makin t more, oothing to ae By r ducin the ir itat on. on h end oi the teat h s w l 'inturn help o' e uee, the h nces o "contracting mastitis.

Other objects andadvant'ages residein thedetails of construction and'operation as mor fully hereinafter described and claimedreference being had 'to the accompanying drawings forming part'LhereoL-wherein like numerals refer to like parts othroughoutuand in which Figure ;1 is a diagrammatic; view showin the 2 Claims. (o 1195-1452 2 Figure 2 is, a longitudinal vertical sectional View of one-embodiment of the present invention,- showthe inner tubular member contracted;' Figure 3 is a view similar to Figure 2but show ing the innertubular member eiip'anded; I Figure 4 is a longitudinal vertical sectional View showing on a reduced scale of the inner tubular member in slightly modified form, the outer tubular member being removed therefrom; Figure 5 is a longitudinal vertical sectional view of the inner tubular member infurther modif ed ,form, the outer tubnlar member. being re moyed therefrom; v

Figure 6 is-a longitudinal vertical sectional v-iewof, the. tubular member in still further modified form, the outer tubular'member being removed therefrom; and,

Figure '7 is a perspective View of the inner tubular member illustrated in Figure 4.

Referring now to the drawings in detail, and more particularly to. Figures, 2 and, 3, wherein for. the purpose of illustration, there is disclosed o e embodiment. of the present invention, the

numeral Ill represents an elongated, resilient,

preferably live rubber with plenty of elasticity to The upper edge 9 th nn ubu -me b s ntee allr o med ith t e flei e a e 26 of a can t. 19d he can 2.8 is oen'trall toe tmrea-e at it, to ac ommoda a teat that wi egg-tend intoth e lowerportion 14 of the innertuhule xuienibe D, The fl ed po tion 26. o the cap 28 is provided with an internal groove 34. that re eives the heading 20 or, the outerntubular me her -l 8,;, i1d the flanged portion126 yieldingly tau the upper end .of. theiouteritubular member 5. that there, will be provided an air Isbpaee betweenlthe inner andouter tubularmem- 352 1 Adjacent the upper end-.of the .outer tubular member l8 there is provided an upper opening 36. A lower opening 38 is also provided in the outer tubular member 18 adjacent the lower end 22 thereof. The upper end of a conduit 40 is fixed to the outer tubular member l8 about or within the upper opening 36 and the conduit 40 is formed with an aperture 42 that registers with the lower opening 38. The opening 36 is of an area greater than the area of the opening 38 for a purpose which will presently be described.

Integrally formed with the outer peripheryv of the inner tubular member ID is an air space divider or skirt 44 having a reinforced upper edge 46 that yieldingly bears against the inner pev In practical use of the present invention illustrated in Figures 2 and 3, the conduits were connected to conduits 48 that branchfrom a further conduit 49 that extends to a motor operated air evacuator or vacuum pump 50 and which is connected to a pulsator P so that the inner tubular member H] can be expanded to comfortably receive a teat. The outlets l6 are connected to a supply line L that extends to a pail 51 supporting the pulsator. 'When the vacuum in the conduits 40 is released, the reduced portion I2 will contract prior to the contraction of the portion 14 (corresponding to the closing of the index finger in hand=milmng). Then, the portion I4 will contract, beginning at its upper part due to the placement of the opening 38 (corresponding to the closing of other fingers, other than the index finger, during hand milking). After the rubber in the teat cup has reduced or contracted to its normal shape, the vacuum pulling on inflation through conduit L from pail, connected at IE, will tend to pull the rubber inflation together in a still smaller space by flattening it as in any ordinary teat cup completing the action as onewould close his finger. By such an operation, with the reduced portion l2 contracting first, milk cannot be forced back into the udder.

.Reference is now directed to Figure 4, wherein there is disclosed the inner tubular member 52 in slightly modified form; In this embodiment, the upper edge of the reduced or concavo-convexed upper portion 54 of the inner tubularmember is integrally formed with the depending flanged portion 56 of a cap 58. The cap 58 is formed with a central teat receiving opening 60 and the flanged portion 56 is provided with an internal groove 62 for receiving the beading of an outer tubular member of shell similar to the aforedescribed element [8. I

The inner tubularmember 52 is identical to the member, l6 except that the member 52 does not include a skirt 44, however, the function andoperation of the member 52 is similar in all respects to the member I0.

As shown in Figure 5, the inner tubular member 64 is provided with a reduced upper portion 66 "whose upper edge is integrally formed with a centrally apertured cap 68 at the juncture of the cap with its flanged portion H3 so that the reduced portion 66 will be as close as possibleto the udder thereby facilitating the member '64 to be utilized with short thick teatsl The teat cup shown in Figure 6 is also employed with relatively'short thick teats and comprises an elongated resilient inner tubular member 72 whose upper reduced portion 14 is integrally formed with a centrally apertured cap 16 at the juncture of the cap 76 with its depending flanged portion 18 to permit the portion 14 to be disposed as close as possible to the udder. a

The outer periphery of the member 12 is integrally formed with a skirt 80 having a reinforced upper edge 82 that will yieldingly bear against the inner periphery of an outer tubular member similar to member I8.

The inner tubular members 64 and 72, like the inner tubular member 52, are constructed for use with the outer tubular member l8, previously described. v

-, In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the device will be quite apparent to those skilled in this art.

A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

Having described the invention, what is claimed ;as new is:

1. In a milking machine teat cup assembly, a teat cup comprising an elongated, resilient inner tubular member having upper and lower portions, an outer tubular member embracing the inner member and having a portion spaced laterally from and disposed about the upper and lower portions of said inner member to define an airspace, a depending peripheral flange at the upper portion of said inner memberyieldingly embracing the upper end of said outer member, the upper portion of said inner member bein reduced in cross-section below said flange, said outer member having upper and lower openings therein, a conduit disposed exteriorly of said outer'member and having an upper end surrounding the upper opening, said conduit having an aperture in registry with the lower opening, a skirt having a lower end integrally formed with the outer periphery of said inner member intermediate the uppeer and lower portions thereof, said skirt being disposed within the outer member and having an upper end engaging the inner peripheryof said outer member below said upper opening and well above said lower opening, and means attached to the lower end of the conduit for evacuating air between said inner and outer members through said upper and lower openings to expand the upper and lower portions of said innermember, said upper opening being of an area greater than the area of the lower opening for expansion and contraction of the upper portion of said inner member prior to the expansion and contraction of the lower portion of said inner member.

2. In a teat cup assembly, a teat cup comprising an inner tubular member having upper and lower open end portions, a rigid outer tubular member embracing the inner memberpthe ends of said outer member being engaged with the ends of the inner member and said outer member being spaced radially outwardly from the inner member to provide an air space, said outer member having upper and lower openings communicating with the air space, a resilient substantially inverted frusto-conical skirt having a lower minor end integrally formed with said inner member intermediate the upper; and lower. ends thereof,,said skirt having an upper major .end yieldingly engaging the inner periphery of said outer member below said upper opening and considerably-above said lower opening, and means operatively connected with the openings for withdrawing air Number from the space between said inner and outer 1,089,838 members. 1,106,846 JAMES L. DAVIS. 1,111,978 5 1,361,435 REFERENCES CITED 1,601,145 The following references are of record in the 1,339,765 file of this patent: 2,079,435

UNITED STATES PATENTS 10 Number Name Date N r 884,781 Uebler Apr. 14, 1908 2 ,2 981,730 Wiggins Jan. 17, 1911 59,072

Name Date Hulbert Mar. 10, 1914 Rieske Aug. 11, 1914 Uebler Sept. 29, 1914 Armes Dec. 7, 1920 Remy Sept. 28, 1926 Knox Jan. 5, 1932 Dinesen May 4, 1937 FOREIGN PATENTS Country Date Great Britain Feb. 16, 1928 Denmark Sept, 29, 1941 

